Question

20b - 16= ? please help

Answer 1

what we have to do??

Answer 2

We have to do what you have to do. :P

Answer 3

what?

Answer 4

It is simple, you need to determine \(b\).. :)

Answer 5

Our first step should be : To add 16 to both the sides, can you do that?

Answer 6

the question is to factor the experession completely

Answer 7

I lose.. :( @gorv

Answer 8

Then who will write the question? you are writing in question box, without writing the question itself? :P

Answer 9

Okay, it is simple then also:
Can you tell me what factor is common between 20 and 16 ?

Answer 10

gcf or lcf

Answer 11

Can you think of any number who will divide both 20 and 16 at the same time, yes GCF.

Answer 12

*which

Answer 13

4

Answer 14

Good.. :)

Answer 15

So, can I write your equation as :

\(4 \times (5b) - 4 \times (4) = 0\), Is it right?

Answer 16

See : \(4 \times (5b)\) will give you again : \(20b\), right?

Answer 17

yes

Answer 18

As, you are seeing \(4\) in both the terms, so you can take \(4\) as common ? Getting?

Answer 19

is the final answer 4 or 4b?

Answer 20

See :
\[4(5b - 4) = 0\]

Answer 21

I have factored out \(4\) outside.

Answer 22

ok

Answer 23

Now equate brackets to \(0\) and tell me what can be value of \(b\) ?